For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningRoof Console Replacement
Dome Lamp Bezel
Roof Console Screw (Qty: 2)
Caution: Refer to Fastener Caution in the Preface section.
Tighten
2.5 N·m (22 lb in)
Roof Console Assembly
Procedure
Disconnect the electrical connectors.
When replacing the driver information display bezel, remove the dri ...
Removal Procedure
Warning: Refer to Approved Equipment for Collision Repair Warning in the
Preface section.
Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface section.
Disable the SIR System. Refer to SIR Disabling and Enabling.
Disconnect the negative battery cable. Refer to Battery N ...
Shock Absorber Disposal
Warning: Use the proper eye protection when drilling to prevent
metal chips from causing physical injury.
Clamp the strut in a vise horizontally with the rod ( 1) completely
extended.
Drill a hole in the strut at the center of the end cap (3) using a 5 mm
(3/16 in) drill bit. Gas o ...